Self-filling fountain-pen.



No. 841,475. PATENTBD JAN. 15, 1907-.

P. E. WIRT. SELF FILLING FOUNTAIN PEN.

APPLICATION FILED APR.13. 1906.

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SJ vwentoz Pa 0 11 7W7? w 13); km eases U ITED sra'rns ATENT OFFICE.

\ PAUL E. WlRT, 0F BLOOMSBURG, PENNSYLVANIA.

SELF-FILLING FouNTAm-PEN. i

F ountain-Pens, of whichthe following is a specification.

This invention relates to self-filling fountainpens of the plunger type,wherein a lunger or piston is employed within the older or case forcreating the necessary vacuum or suction to effect a filling of thereser-.

i To this end the-invention has specially in view the provision of aractical form of pumping attachmentfor ountain-pens emodying simplicityof construction, a minimum number of parts, and reliability of action.

In this connection the invention has. for a general object dispensingwith the employment of collapsible rubber sacks-or bags as a reservoirfor the pen and also obviating the use of press-bars, levers, cams, andthe various kinds of auxiliary devices and attachments that areordinarily associated with the rubber sack common to many self-fillingpens.

In carrying out the above objects the pres ent invention provides aplunger-pumping device or attachment which does not increase in any waythe desirable proportions of a fountain-pen, while at the sametimeinvolventirely out of the waywith'but affecting or disturbing theordinary functions 'of the fountain-pen.

With these and other objects in view, which will'more readily appear asthe nature of the invention is better understood, the same consists inthe novel construction, combination, and arrangement of partshereinafter more fully described, illustrated, and

claimed.

The essential features of the invention involved in the construction andrelation of the plunger-head and the controlling-stem therefor aresusceptible to some structural modifications without affecting the scopeof the invention, a preferred embodiment of which is shown in theaccompanying drawin s, in whichlgure 1 is a sectional view of fountain--Specification of Letters Patent.

Application filed April 13,

1906- seria nasnazi.

pen equipped with the filling attachment contemplated by the presentinvention and showing the plunger-head. and its controllingstemdisconnected nd in the position which they occupy when Thepe11-reservoir is filled. Fig. .--2 is a similar view showing theplungerhead and stem releasably hooked together or engaged to permit ofthe reciprocation ofthe plungen-head for fillin purposes. Fig. 3 is aperspective view of t e complete pumping attachment or device, showingthe varlous parts thereof separated. Fi 4 is a detail in perspective,showin a mo ification which may be resorted to 1n the construction of aplunger-head.

The improvements contemplated herein are capable of application to theordinary types of fountain-pens, so for illustrative purposes there isshown in the drawings a fountain-pen embodying in its generalorganization a reservoir-holder 1, Whose inthe pen. Also, in theconstruction illustrated, the liolder 1 is equipped at one end with thepen-bearing sectlon or nozzle 3, fitted with the pen-point 4 and thefeeder 5. It is preferable in carrying out the present invention toprovide the holder, container, or case 1 atthe end opposite thepen-bearing section with a threaded socket 6, adapted to receive theeXteriorly-threaded fasteningcollar 7, formed at the inner side of anoperating-knob 8, to which is permanently screwed the front end of thereciprocating plunger-stem 9, which in conjunction with the plungerehead10 constitutes apumping attachment or device for filling the pen-reser-A distinctive feature of the invention reger-head l0 and its relation tothe stem 9. Referring to the plunger-head structure, it will -beobserved that the same essentially sitely-arranged head-disks 11 and 12,respectively, and an interposed larger packin -disk 13, preferably ofcork. 12, and 13 are placed in closely-assembled relation and are unitedin said relation through the medium of a plurality of fastening-pins ofrivets 14, extending through alined openings in the several disks andupset or riveted at their ends onto the head-disks.

The plunger-head 10 as'an entirety is provided therethrough with whatmay be termed a stem slide opening 15, which slidably sides in thespecific construction of the plun- The-several dis s 11,

Patented Jan. 15, 1907.

terior chamber 2' constitutes the reservoir of and preferably consistsof a pair of oppo interior surface of the holder, but also packs theplunger-stem, thereby obviating leakage.

Also the said cork packing grips the interior surface of the holder withsufiicient firmness to hold the lunger-head stationary in any positionin W ioh it may be left by the stem.

To provide for the releasable or interlocking engagement between theplunger-stem and the lunger-head, the latter is preferably provided onone of its head-disks 12 with an integral offset keeper-hook 16, adaptedto be engaged by a laterally-projecting catch rojection- 17 at the innerterminal of the p unger-stem 9. In this connection a modification thatmay be resorted to is the one suggested in Fig. 4, wherein thekeeper-hook 16 is illustrated as of a duplex construction havingoppositely-arranged hook elements 18, so that an engagement of theplunger-stem catch may be made with the kee er byturning the stem ineither direction. owever, the single type of hook seems to be thepreferable one, inasmuch as it simply requires the turning of the stemin one direction for engagement purposes and in the other direction fordisconnecting the stem and the plunger-head.

When it is desired to fill the pen, the parts bein in the positionsshown in Fig 1, it is simp y necessary tounscrew the operatingknob, drawout the stem, and turn the latter to bring its catch beneath and intoengagement with the keeper-hook of the plungerhead. This looks the partstogether, so that the plunger-head can be reciprocated to draw in asupply of ink for the reservoir. After this is done and the plunger-headbrought to the outer end of the container the stem is turned todisconnect the same and then moved back into the holder and the op- 1erating-knob secured by screwing in the fasger-stem slidable through thehead an provided with a terminal catch projection adapted to beturned'into and out of en 'agement eing arwith said hook, the saidpackingi1 1d d 0 er an ranged to ack the head 1n the also to pac theplunger-stem.

- In testimony whereof I hereuntoafliz; my signature in the presence oftwo witnesses.

. PAUL WIRT.

Witnesses JAs. C. BROWN, S. F. PEAOOCK.

